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Hi, Jairo, thanks! |
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On Thu, Feb 5, 2009 at 3:54 AM, <Jairo.Cardozo@×××.com> wrote: |
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> Chuanwen, |
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> |
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> I was trying to run iozone in cluster mode, and faced the same issue you |
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> are. |
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> |
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> I found the solution. My cluster has two network interfaces, one for admin, |
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> one to connect to the NFS share. I wanted to use jumbo frames to have |
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> better network performance, so I enabled jumbo frames, MTU size was changed |
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> on both interfaces to 9000. iozone uses the admin network to connect the |
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> master and the clients. |
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> |
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> After I changed the MTU size back to 1500 on the admin interface, voila, |
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> iozone worked. For some reason, when the client is trying to get back to |
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> the master, it does not like jumbo frames. |
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I have checked the MTU of the net interface, and it's 1500. I didn't |
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change the default value: |
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# ifconfig | grep MTU |
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UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1 |
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-- |
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wcw |
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